There are some pieces of code that are so simple and obvious that they really ought to be included in base R somewhere. Geometric mean and standard deviation – a staple for anyone who deals with lognormally distributed data. geomean <- function(x, na.rm = FALSE, trim = 0, ...) { exp(mean(log(x, ...), na.rm = na.rm, 
Hans Rosling eat your heart out! It is now possible to interface R statistics software to Google’s Gapminder inspired Chart Tools. The plots below were produced using the googleVis R package and three datasets from the Gapminder website. The first shows the relationship between income, life expectancy and population for 20 countries with the highest ...
Get the new macro now hosted on githubEdit 18th Jan 2011: The below text refers to the old version of the macro and is no longer relevant, a new post will describe the new macro, and it is also documented on the github site.As a follow ...
Several R functions take model formulae as parameters. Model formulae are symbolic expressions. They define a relationship between variables rather than an arithmetic expression to be evaluated immediately. Model formulae are defined with the tilde ope...
Several R functions take model formulae as parameters. Model formulae are symbolic expressions. They define a relationship between variables rather than an arithmetic expression to be evaluated immediately. Model formulae are defined with the tilde ope...
English cricket is strong once again. And it is great to see that (after all they invented the gentleman's game).In a sharp contrast to previous tours of Australia, England outplayed Australia on their home ground in the recently concluded Ashes 2...
English cricket is strong once again. And it is great to see that (after all they invented the gentleman's game).In a sharp contrast to previous tours of Australia, England outplayed Australia on their home ground in the recently concluded Ashes 2...
As a former Excel chart user, I want to help current Excel users make the transition to more advanced charting R with as little difficulty as possible. This post introduces my LearnR Toolkit to help Excel users move up to … Continue reading ...
Just after arriving in Montréal, at the beginning of September, I discussed statistics of my blog, and said that it might be possible - or likely - that by new year's Eve, over a million page would have been viewed on my blog (from Google's count...
R interfaces with the powerful Google Visualization API with the package googleVis (see here). It's relatively easy to convert your graphics in R to interactive graphics to post on a web browser. And the graphics are quite nice, as seen below in a simple graph of some of my data collected from this summer on seed predation to...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
